Cisco Router High Cpu Interrupts

Contents

To learn about route summary, see the “Configuring IP Unicast Routing” chapter in the software configuration guide (only Layer 3 switches). Can this number be written in (3^x) - 1 format? This message is used to identify objects that use more CPU time than expected (but still not CPUHOG). Switch #show platform port-asic stats drop Port-asic Port Drop Statistics - Summary ======================================== RxQueue Drop Statistics Slice0 RxQueue 0 Drop Stats Slice0: 0 RxQueue 1 Drop Stats Slice0: 0 RxQueue 2 this contact form

The PCI memory is used for memory access to the GT64260 controller on the PRP mainboard for the PCI buses connected to it. Determining Causes and Solving the Problem Use the show processes cpu command to check if CPU utilization is high due to interrupts or processes. number of unicast mac addresses: 6K number of IPv4 IGMP groups + multicast routes: 1K number of IPv4 unicast routes: 8K number of directly-connected IPv4 hosts: 6K number of indirect IPv4 In the next example, the interrupt percentage is low compared to the CPU utilization percentage (5 percent compared to 82 percent). http://www.cisco.com/c/en/us/support/docs/routers/10000-series-routers/15095-highcpu.html

Cisco Router High Cpu Interrupts

In versions prior to 12.4(13) on the 2600, the processes ran for longer times but did not generate messages because the IOS versions did not have this enhancement. If the switch TCAM is full, the hardware routes packets only for destination IP addresses that are in the TCAM. Use the sdm prefer template-name global configuration command to change to a template that reserves more resources for IP routing. For more details, refer to the description of the logging buffered global configuration command.

Thus, more recent values have more influence on the calculated average. Verify that Cisco Express Forwarding is enabled and working by issuing the show ip cef summary command. It is normal for the CPU to go high due to this SNMP ENGINE process. Hulc Led Process If yes, periodically collect the output of the show processes cpu command, which shows if the high CPU utilization is caused by interrupts or by a certain process.

Every day, thousands of new job vacancies are listed on the award-winning platform from the region's top employers. Note:Only Distance Vector Multicast Routing Protocol (DVMRP) tunnel interfaces are supported for multicast routing in the Catalyst 3750. You can use this statistic to determine how many additional TCAM resources are needed to hold the routes being advertised in the network at this time. http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/troubleshooting/cpu_util.html Identifying Network Packets Received by the CPU These techniques to determine the type of packets being sent to CPU can complement each other or can be used individually.

The CPU becomes too busy when either an IOS process consumes too much CPU time or the CPU receives too many packets from the switching hardware. Fed Process Cisco Then, to run it every five minutes, add the following line to the /etc/crontab file: */5 * * * * /usr/bin/router-script Restart the cron server. While the switch might appear to operate fine at this CPU utilization level, when the switch CPU sustains a 50 percent utilization, its ability to react to dynamic network events is Some NMS/instrumentation tools do not behave well when polling.

How To Check Bandwidth Utilization On Cisco Router

show processes cpu Command This is an example of the header of the show processes cpu command: CPU utilization for five seconds: X%/Y%; one minute: Z%; five minutes: W% PID Runtime(ms) useful source See the “Determining Interrupt Percentage” section for how to identify a high interrupt percentage. Cisco Router High Cpu Interrupts Here is an example: lev1841#show processes cpu sorted CPU utilization for five seconds: 41%/39%; one minute: 42%; five minutes: 32% PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 96 88 Ip Input High Cpu Spam (unsolicited advertising).

Related Information Understanding EtherChannel Inconsistency Detection Multicast Does Not Work in the Same VLAN in Catalyst Switches CPU Utilization on Catalyst 4500/4000, 2948G, 2980G, and 4912G Switches That Run CatOS Software weblink routing protocol—Used for routing protocol packets received by other network devices. Normal Conditions with High CPU Utilization In some network deployments, a busy CPU is normal. This issue is documented in Cisco bug ID CSCsl18139 (registered customers only) . Show Memory Usage Cisco

Note:Granularity must be a power of 2 and should be as small as possible (but not smaller than 4) Start profiling by doing profile Profile Conventions Refer to Cisco Technical Tips Conventions for more information on document conventions. Step 2 show logging Display the contents of the standard system logging buffer. navigate here In this case, the system behaves differently than expected, but the underlying cause is a hard- ware failure, a software failure, or a configuration error.

For example, Queue 0 in this output corresponds to rpc in the previous output;. Arp Input High Cpu The packets routed through this tunnel must be switched through software. The most commonly used Cisco IOS commands used for this purpose are the show processes CPU, show memory, and show interface commands, as covered in the sections that follow.

Register Hereor login if you are already a member E-mail User Name Password Forgot Password?

This is an example of turning on the CPU queues one at a time until console floods. The first is the username, then the password, and so on. There is no workaround for this problem. Troubleshoot High Cpu Usage Linux The network loop can also be a reason for the traffic overload.

Therefore, the output of the show logging exec command should be checked first for any errors related to the process which consumes lots of CPU cycles. This is why even in the simplest of deployments, the switch never reports 0% CPU utilization. Components Used This document is not restricted to specific software and hardware versions. his comment is here To resolve TCAM utilization issues, you should choose the appropriate SDM template for the switch application.

Yes No Feedback Let Us Help Open a Support Case (Requires a Cisco Service Contract) Related Support Community Discussions This Document Applies to These Products Catalyst 3750 Series Switches Catalyst 3750-E The Catalyst 2960 switch running the LAN base image has a smaller number of active processes than a stack of Catalyst 3750 switches.